A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 5999-00-168-1888
NSN 5950-01-509-2250
NSN 6620-00-912-0255
NSN 6110-01-039-1151
NSN 6320-01-054-3046
NSN 5915-00-327-4788
NSN 6240-00-297-3919
NSN 6135-00-603-4859
NSN 6620-01-478-4299
NSN 5999-01-566-4930
NSN 6645-01-496-0073
NSN 6220-00-581-3858